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Finding the Fourth Proportional to 163,705.80, 245,328.30 and 121,254.60

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Solution

The fourth proportional to 163,705.80, 245,328.30 and 121,254.60 is: 181,711.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    163,705.80 : 245,328.30 = 121,254.60 : x
  2. Step 2: Convert to fraction form
    163,705.80/245,328.30 = 121,254.60/x
  3. Step 3: Cross multiply
    163,705.80x = 245,328.30 × 121,254.60
  4. Step 4: Simplify right side
    163,705.80x = 29,747,184,885.18
  5. Step 5: Solve for x
    x = 29,747,184,885.18/163,705.80
  6. Step 6: Final answer
    x = 181,711.25

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.